LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES
Description
The LM4040 is a family of bandgap circuits designed to achieve
precision micro-power voltage references of 2.5V, 3.0V and 5.0V. The
devices are available in 0.2% B-grade, 0.5% C-grade and 1% D-
grade initial tolerances.
They are available in small outline SOT23 surface mount packages
which are ideal for applications where space is at a premium.
Excellent performance is maintained over the 60µA to 15mA
operating current range with a typical temperature coefficient of only
20ppm/° The device has been designed to be highly tolerant of
C.
capacitive loads so maintaining excellent stability.
This device offers a pin for pin compatible alternative to the LM4040
voltage reference.
Pin Assignments
(Top View)
* Pin 3 must be left floating or connected to pin 2
SOT23
LM4040 H5 (SC70-5)
(Top View)
Anode
1
*
Features
Small Package: SOT23
SC70-5 Variants Are End of Life (EOL)
No Output Capacitor Required
Output Voltage Tolerance
LM4040B ±0.2% at +25°
C
LM4040C ±0.5% at +25°
C
LM4040D ±1% at +25°
C
Low Output Noise
(10Hz to 10kHz) .............. 45µV
RMS
Wide Operating Current Range 60µA to 15mA
Extended Temperature Range -40° to +125°
C
C
Low Temperature Coefficient 100 ppm/° (max)
C
Green Molding in Small Package SOT23
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
An Automotive-Compliant Part is Available Under Separate
Datasheet (LM4040Q)
4
N/C
2
5
N/C
Top View
SC70-5**
Cathode
3
* Pin 2 must be left floating or connected to pin 1
* Pin 2 must be left floating or connected to pin 1.
** SC70-5 variants are End of Life (EOL).
Applications
Battery Powered Equipment
Precision Power Supplies
Portable Instrumentation
Portable Communications Devices
Notebook and Palmtop Computers
Data Acquisition Systems
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
LM4040
Document number: DS33195 Rev. 7 - 2
1 of 12
www.diodes.com
February 2017
© Diodes Incorporated
LM4040
Absolute Maximum Ratings
(Voltages to Anode Unless Otherwise Stated)
Parameter
Continuous Reverse Current
Continuous Forward Current
Operating Junction Temperature
Storage Temperature
Caution:
Rating
20
10
-40 to +150
-55 to +150
Unit
mA
mA
°
C
°
C
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings
only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not
implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
(Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.)
Unless otherwise stated voltages specified are relative to the Anode pin.
Package Thermal Data
Package
SOT23
θ
JA
380°
C/W
P
DIS
T
A
= +25° T
J
= +125°
C,
C
330mW
Recommended Operating Conditions
Parameter
Reverse Current
Operating Ambient Temperature Range
Min
0.06
-40
Max
15
+125
Unit
mA
°
C
Electrical Characteristics
(Test conditions: T
A
= +25° unless otherwise specified.)
C,
LM4040-2.5
Symbol
Parameter
Reverse Breakdown
Voltage
V
REF
Reverse Breakdown
Voltage Tolerance
Minimum Operating Current
Average Reverse
Breakdown Voltage
Temperature Coefficient
Conditions
—
I
R
= 100µA
I
R
= 100µA
—
I
R
= 10mA
I
R
= 1mA
I
R
= 100µA
I
RMIN
≤ I
R
≤ 1mA
+25°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
-40 to +125°
C
T
A
Typ
2.5
—
45
—
±20
±15
±15
0.3
—
2.5
—
0.3
35
120
0.08
LM4040
B Limits
—
±5
±21
±30
60
65
68
—
±100
—
0.8
1.0
1.0
6.0
8.0
8.0
0.8
—
—
—
LM4040
C Limits
—
±12
±29
±38
60
65
68
—
±100
—
0.8
1.0
1.0
6.0
8.0
8.0
0.9
—
—
—
LM4040
D Limits
—
±25
±49
±63
65
70
73
—
±150
—
1.0
1.2
1.2
8.0
10.0
10.0
1.1
—
—
—
Unit
V
mV
I
RMIN
µA
ΔV
R
/ΔT
ppm/°
C
ΔV
R
/ΔI
R
Reverse Breakdown
Change with Current
Z
R
e
n
V
R
V
HYST
Dynamic Output
Impedance
Noise Voltage
Long Term Stability (Non
Cumulative)
Thermal Hysteresis
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
1mA ≤ I
R
-40 to +85°
C
≤ 15mA
-40 to +125°
C
I
R
= 1mA, f = 120Hz
I
AC
= 0.1I
R
I
R
= 100µA
10Hz < f < 10kHz
t = 1000Hrs, I
R
= 100µA
ΔT = -40° to +125°
C
C
mV
Ω
µV
RMS
ppm
%
LM4040
Document number: DS33195 Rev. 7 - 2
2 of 12
www.diodes.com
February 2017
© Diodes Incorporated
LM4040
Electrical Characteristics
(Cont.) (Test conditions: T
A
= +25° unless otherwise specified.)
C,
LM4040-3.0
Symbol
Parameter
Reverse Breakdown
Voltage
V
REF
Reverse Breakdown
Voltage Tolerance
Minimum Operating Current
Average Reverse
Breakdown Voltage
Temperature Coefficient
Conditions
—
I
R
= 100µA
I
R
= 100µA
—
I
R
= 10mA
I
R
= 1mA
I
R
= 100µA
I
RMIN
≤ I
R
≤ 1mA
+25°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
-40 to +125°
C
T
A
Typ
3.0
—
47
—
±20
±15
±15
0.4
—
2.7
—
0.4
35
120
0.08
LM4040
B Limits
—
±6
±26
TBD
62
67
70
—
±100
—
0.8
1.1
1.1
6.0
9.0
9.0
0.9
—
—
—
LM4040
C Limits
—
±15
±34
±45
62
67
70
—
±100
—
0.8
1.1
1.1
6.0
9.0
9.0
0.9
—
—
—
LM4040
D Limits
—
±30
±59
±75
67
72
75
—
±150
—
1.0
1.3
1.3
8.0
11.0
11.0
1.2
—
—
—
Unit
V
mV
I
RMIN
µA
ΔV
R
/ΔT
ppm/°
C
ΔV
R
/ΔI
R
Reverse Breakdown
Change with Current
Z
R
e
n
V
R
V
HYST
Dynamic Output
Impedance
Noise Voltage
Long Term Stability (Non
Cumulative)
Thermal Hysteresis
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
1mA ≤ I
R
-40 to +85°
C
≤ 15mA
-40 to +125°
C
I
R
= 1mA, f = 120Hz
I
AC
= 0.1I
R
I
R
= 100µA
10Hz < f < 10kHz
t = 1000Hrs, I
R
= 100µA
ΔT = -40° to +125°
C
C
mV
Ω
µV
RMS
ppm
%
Electrical Characteristics
(Cont.) (Test conditions: T
A
= +25° unless otherwise specified.)
C,
LM4040-5.0
Symbol
Parameter
Reverse Breakdown
Voltage
V
REF
Reverse Breakdown
Voltage Tolerance
Minimum Operating Current
Average Reverse
Breakdown Voltage
Temperature Coefficient
Conditions
—
I
R
= 100µA
I
R
= 100µA
—
I
R
= 10mA
I
R
= 1mA
I
R
= 100µA
I
RMIN
≤ I
R
≤ 1mA
+25°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
-40 to +85°
C
-40 to +125°
C
-40 to +125°
C
T
A
Typ
5.0
—
54
—
±30
±20
±20
0.5
—
3.5
—
0.5
80
120
0.08
LM4040
B Limits
—
±10
±43
±60
74
80
83
—
±100
—
1.0
1.4
1.4
8.0
12.0
12.0
1.1
—
—
—
LM4040
C Limits
—
±25
±58
±75
74
80
83
—
±100
—
1.0
1.4
1.4
8.0
12.0
12.0
1.1
—
—
—
LM4040
D Limits
—
±50
±99
±125
79
85
88
—
±150
—
1.3
1.8
1.8
10.0
15.0
15.0
1.5
—
—
—
Units
V
mV
I
RMIN
µA
ΔV
R
/ΔT
ppm/°
C
ΔV
R
/ΔI
R
Reverse Breakdown
Change with Current
Z
R
e
n
V
R
V
HYST
Dynamic Output
Impedance
Noise Voltage
Long Term Stability (Non
Cumulative)
Thermal Hysteresis
+25°
C
-40 to +85°
C
-40 to +125°
C
+25°
C
1mA ≤ I
R
-40 to +85°
C
≤ 15mA
-40 to +125°
C
I
R
= 1mA, f = 120Hz
I
AC
= 0.1I
R
I
R
= 100µA
10Hz < f < 10kHz
t = 1000Hrs, I
R
= 100µA
ΔT = -40° to +125°
C
C
mV
Ω
µV
RMS
ppm
%
LM4040
Document number: DS33195 Rev. 7 - 2
3 of 12
www.diodes.com
February 2017
© Diodes Incorporated
LM4040
Typical Characteristics LM4040-2.5
1.00
0.75
0.50
∆V
REF
(%)
)
%
(
F
0.25
0.00
-0.25
-0.50
-0.75
-1.00
-40
0
40
80
TEMPERATURE (°
C)
Reference Voltage
Temperature Coefficient
120
∆V
REF
(%)
I
R
= 100µA
1.00
0.75
0.50
)
%
(
F
0.25
0.00
-0.25
-0.50
-0.75
-1.00
-40
0
40
80
TEMPERATURE (°
C)
Reference Voltage
Temperature Coefficient
120
I
R
= 1mA
V
E
R
V
E
R
100
Z
R
, REFERENCE IMPEDANCE ()
T
A
= 25°
C
I
R
= 100µA
C
L
= 1.0µF
Tantalum
C
L
= 0
)
(
E
C 10
N
A
D
E
P
M
I
1
E
C
N
E
R
E
F
E 0.1
R
,
R
Z
T
A
= 25°
C
I
R
= 1mA
C
L
= 1.0µF
Tantalum
C
L
= 0
100
1k
10k
100k
1M
0.01
100
FREQUENCY (Hz)
Reference Impedance vs. Frequency
500
480
460
440
)
z
H
/
V
n
(
E
S
I
O
N
NOISE (nVHz)
420
400
380
360
340
320
300
-1
1
2
FREQUENCY (Hz)
Noise Voltage vs. Frequency
0
3
-300
-1
T
A
= 25°
C
I
R
= 100µA
10k
100k
1M
FREQUENCY (Hz)
Reference Impedance vs. Frequency
1k
500
400
)
A
µ
(
300
T
N
E
R
200
R
U
C
100
E
S
R
E
0
V
E
R
,
R
-100
I
-200
T
A
= 25°
C
I
R
, REVERSE CURRENT (µ
A)
0
1
2
V
R
, REVERSE VOLTAGE (V)
Reference Current vs. Voltage
3
LM4040
Document number: DS33195 Rev. 7 - 2
4 of 12
www.diodes.com
February 2017
© Diodes Incorporated
LM4040
Typical Characteristics LM4040-3.0
1.00
0.75
0.50
∆V
REF
(%)
I
R
= 100µA
1.00
0.75
0.50
∆V
REF
(%)
)
%
(
0.25
I = 1mA
)
%
(
0.25
0.00
-0.25
-0.50
-0.75
-1.00
-40
0
V
F
E
R
V
F
E
R
0.00
-0.25
-0.50
-0.75
40
80
TEMPERATURE (°
C)
Reference Voltage
Temperature Coefficient
120
-1.00
-40
0
40
80
TEMPERATURE (°
C)
Reference Voltage
Temperature Coefficient
120
100
Z
R
, REFERENCE IMPEDANCE (
)
T
A
= 25°
C
I
R
= 100µA
C
L
= 1.0µF
Tantalum
C
L
= 0
10
1
0.1
100
1k
10k
100k
1M
0.01
100
FREQUENCY (Hz)
Reference Impedance vs. Frequency
650
10k
100k
FREQUENCY (Hz)
Reference Impedance vs. Frequency
1k
1M
500
T
A
= 25°
C
600
NOISE (nV/
Hz)
550
500
450
)
A
µ
(
T
N
E
R
R
U
C
E
S
R
E
V
E
R
,
R
I
I
R
, REVERSE CURRENT (µ
A)
400
300
200
100
0
-100
-200
400
10
100
1k
10k
FREQUENCY (Hz)
Noise Voltage vs. Frequency
100k
-300
-1
0
1
2
3
V
R
, REVERSE VOLTAGE (V)
Reference Current vs. Voltage
4
LM4040
Document number: DS33195 Rev. 7 - 2
5 of 12
www.diodes.com
February 2017
© Diodes Incorporated
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